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(No Model.)

A. WOLFP. APPARATUS FOR MANUFACTURING GELATINE AND GLUE. No. 496,469.

Patented Maya; 1893;

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Untrrsn STATES PATENT I OFFICE.

FRIEDRICH AUGUST W'OLFF, OF I-IEILBRONN, GER MANY.

APPARATUS FOR MANUFACTURING GELATIN E AN D GLUE.

SPECIFICATION forming part of Letters Patent No. 496,469, dated May 2, 1893.

Application filed April 22,1892- .To all whom it may concern.-

Be it known that I, FRIEDRICH AUGUST WOLFF, a citizen of Wiirtemberg, residing at Heilbronn, in the Kingdom of Wiirtemberg, Germany, have invented certain newand useful Improvements in Apparatus for Manufacturing Gelatine and Glue; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the method and means for treating gelatine glue and similar substances, and its object is to avoid the wastes and imperfections resulting from the methods heretofore employed for manufacturing these substances. 7

For this purpose my invention essentially consists in conducting the glue, &c., in a thin continuous sheet along a path of sufficient length to enable the glue to harden and set sufficiently to be cut and deposited upon drying plates, which are then introduced into drying chambers, of any well known or suitable arrangement for completing the drying of the glue. I preferably conduct the sheet of glue, &c., through a closed chamber, or cas-.

ing, through which I conduct a current of air, by an exhaust or force pump, preferably, in a direction opposite to that in which the sheet of glue is traveling.

In the accompanying drawings I have represented an apparatus which I consider the best in form to carry my invention into effect.

In the drawings, Figure 1, represents a vertical longitudinal section of the apparatus. Fig. 2, isavertical transversesection on theline 22, Fig. 1; Fig. 3, a plan view partly in section, and Fig. 4, a transverse vertical section, on an enlarged scale, through the casing and glue carrying apron, on line 4-4, Fig. 1.

A, represents the reservoir for holding the liquid glue. To the bottom thereof is connected the pipe a, provided with a cook a. Upon opening the cook a the liquid glue flows out upon an endless belt 0, running over the pulleys E E This arrangement is best shown in Fig. 1. The belt 0 is provided on its outer surface with a layer of wax-cloth B, or similar material having a smooth surface which prevents the adhesion of the glue thereto.

Serial No. 430,247. (No model.)

This outer layer of wax-cloth, as shown in Fig. 4, overlaps or projects beyond the edges of the endless belt or apron O. In order to support the belt between the pulleys E and E and prevent its sagging, rolls or idlers c are arranged below the same at suitable intervals. The entire belt is inclosed Within a suitable chamber or casing F. As will be noted by reference to Fig. 4, two horizontal strips or ledges 1), whose forward ends are bent downwardly extend into the casing from the outer walls of the same near the top thereof. These ledges b,.as will be readily understood by reference to Fig. 4, serve the purpose of raising and supporting the outer edges of the wax-cloth coating B, and thereby to form an endless trough for holding the liquid glue and preventing the same from runningover the edges of the endless belt 0. As the belt passes over the pulley E the same is reversed as shown at 0, so as tobring the sheet of glue uppermost. The lower portion of the belt is-also supported by rollers c, as

shown. Before reaching the pulley E the belt. 0 is again reversed, as at 0 so as to return.

it to its original position. A stripper e, which may be a blade of steel or other suitable material, extends from the casing toward the belt, and serves to strip the sheet of glue or other material, which has now sufficiently hardened, from the belt 0, whose further progress deposits the sheet of glue upon an endless belt 2', running over pulleys J, and which is arranged at a suitable point to receive the glue, as shown. Above the belt 2' is arranged a r0- tary cutter G, preferably consisting of a transverse blade mounted on a pulley which derives its motion from the shaft of the pulley E, as shown. Below the belt t', is arranged another endless belt 70, which may also derive its motion from the shaft of the pulley E, and which may be of sufficient length to extend into the drying chamber. Upon this belt k, the operator deposits the drying plates R upon which the tablets or cakes of glue are deposited as they leave the cutter G, as illustrated in Fig. 1. I preferably provide an air blast which passes over the surface of the sheet of glue in a direction contrary to its travel. I preferably eifect this by dividing the casing F into two compartments by a partition F between the pulleys E and E and within the belt C. The lower part of the easing is provided with an air inlet f while the upper portion of the casing F, is provided with a ductf leading to an exhaust fan or blower H, of any suitable form or construction.

The mode of operation of this apparatus is evident from the foregoing. The liquid glue is deposited upon the belt C, in a film Whose thickness may be accurately regulated by adjusting the speed of the belt 0. As this sheet of film travels along on the belt it encounters the current of air, which serves to cool the same and also to carry off the products of evaporation. As the sheet of glue arrives at the end of its path. it is stripped from the belt by the strippercand deposited upon the belt 2' to be subsequently cut into sections, or tabets of suitable size by the cutter G, and finally deposited upon the drying plates B.

What I claim, and desire to secure by Letters Patent, is

In an apparatus for treating glue and the like, a movable apron for receiving the liquid glue in combination with a stripper and a cut- 

